Sunday, May 24, 2020

LEICA-SINAR VIEW CAMERAS AND DIGITAL BACKS



p3 04


By Heinz Richter

The pinnacle of professional photography is, and will remain, the view camera, for which the make of Sinar is one of the best known manufacturers.  After becoming part of Leica Camera AG, they have been able to develop some exciting new things.

During recent years, photography with view cameras has had to struggle considerably with the digital photography juggernaut, even though Sinar view cameras continue to be in daily use, especially when it comes to professionalism and unhindered creativity.

p3 08
Sinar p-slr 

product p3
Sinar p3-pf

p3 04
Sinar p3-df

View camera with their numerous adjustment possibilities are still without equal.  Perspective and overall sharpness can be controlled and evaluated directly with the camera.  Post production processes with computer systems, which often result in visible loss of quality, are unnecessary.

The principles of optical design remain unchanged with digital photography, but cameras and lenses needed to reach entirely new dimensions in terms of resolution and image quality.  New and specifically designed camera systems are capable to take full advantage of the capabilities of today’s digital backs.  However, this is only possible with modern view cameras and their adjustment capabilities which allow for proper adjustments of perspective, adjustments to obtain correct proportions and undistorted angles.  In addition, only view cameras allow altering the plane of focus in an image via the application of the Scheimpflug principle.

Sinar professional camera systems are optimized for digital professional photography. The Sinar p3 professional camera sets the standards in professional studio photography, thanks to the self-locking gears and overall precision.  All digital backs, regardless of manufacturer, can be adapted to the Sinar camera platforms.

s3045 sensor

But Sinar also provides professionals with their own one- and multi-shot digital backs. The Sinarback eXact is based on the Sinar Microscan technology and achieves image data up to 576 MB (RGB / 8-bit) in multi-shot quality. Thanks to a downscaling function, image sizes of twelve to 192 megapixels can be generated with this back.

With the Sinarback eVolution 86H, 1- and 4-Shot captures can be taken with its 50 MPx sensor, and prints of up to 50 cm x 70 cm can easily be produced.


Thanks to a unique adapter concept, it takes only a few simple moves to mount a Sinarback on a wide variety of camera platforms, including other brands. In addition, you can use this digital back not only with a view camera, but also with medium format camera systems.

The Sinarback eXact opens up a whole range of possibilities for you – use it flexibly in any studio situation, from packshots to high-end photography.

With this digital back, you can create multi-shot photography with 4 or 16 shots, allowing you to get resolution of up to 192 megapixels! In addition, the Sinarback eXact has a built-in downscaling function. That means, if required, you can also take photographs at low resolutions of 12 or 24 megapixels. With one digital back you are ready for all applications.

"It's easier to get the color you want by recording the color that's there."
Prof. Dr. Roy S. Berns, color expert at the Rochester Institute of Technology, USA
Photo: Roy S. Berns

In Multi-shot photography, each pixel is captured by every primary color. You achieve an unimagined level of color accuracy and intensity. In addition, moirĂ© will be prevented. Since there is no interpolation, there is no loss of definition either. The result is brilliant, sharp images of the highest quality.  The multi shot Sinarbacks make it possible to reproduce the entire color spectrum perceptible to the human eye with absolute precision.  With these backs  Sinar has redefined color accuracy in digital photography. In addition, since they eliminate  the need for time-consuming color corrections, they also save valuable time.  Applications, for instance, are the digitization of artwork, reprography, and scientific photography, all of which require very accurate color reproduction.

Detail from the painting "Mathilde Boscovits" by Friedrich Boscovits (1845-1918). © Regula Schmid

The Multi-shot Sinarbacks are designed for reliable studio work. They avoid electronic components like displays, batteries and internal memory as they can produce heat that causes color noise. The dual cooling of the sensor secures consistently high-quality photography, even over long shootings.

Sinar multi-shot backs are used especially in still-life photography or in archival  photography. They deliver four times the color resolutions compared to instant capture models. These differences in image quality are quite obvious and cannot be achieved with even the most powerful oneshot products. In four-shot shots, the CCD pixel matrix is shifted three times from one exposure to the next by exactly one pixel raster so that each pixel is captured by each base color (red, blue, and green twice). A further decisive argument for the multishot technology is the markedly reduced moirĂ© effect, which is hardly visible due to the controlled color overlay. With this recording technique the image interpolation is completely eliminated.

Especially museums rely on Sinar CTM (CTM = Color to Match), a joint development of Sinar with RIT, the Rochester Institute of Technology. With this dual-pass filter system extreme color accuracy of multispectral multi-shot images are combined with the workflow of a digital camera system. The preferred fields of application here are the digitization of artifacts as well as reproduction and scientific photography with claim to extreme color fidelity.


The new Sinarback S 30|45 is specially designed for mobile use. A 3 "inch display provides a live image, which can also be shown on an iPad. On-Location, the image data is stored on CF or SD cards. Thanks to tethered shooting via USB 3.0, the data can also be transferred directly to the software Sinar CaptureFlow. A special feature is the fact that the back can be used not only for photos. Optionally a video function in Full HD up to 4K resolution is available.

With the addition of Sinar to the range of Leica products, Leica Camera AG offers by far the most diversified and the widest selection of different cameras of any camera manufacturer.

More information can be found here



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Saturday, May 23, 2020

LEICA M2-250





By Heinz Richter

Recently I sold a few Leica items on eBay.  One of the potential buyers struck my interest with his eBay screen name of Schmirgelpapier.  Taking a closer look revealed that it was Don Goldberg of DAG Camera Repair, one of the best Leica repair technicians in the country.  I hadn't talked to Don for a while and it was nice to catch up.  Needless to say, we also talked about the LEICA Barnack Berek Blog.  I asked him if he would be willing to contribute some of his wisdom to the blog, only to be totally surprised by his answer.

One of the items he was interested to talk about was a Leica M2-250, an off the shelf camera that his father Norman Goldberg had converted in the 1960s to accept film for 250 exposures.  I had never heard of this camera and I was eager to learn more about it.

Norman Goldberg was born in Chicago in 1931 and, after serving a five-year apprenticeship in camera repair and attending the Illinois Institute of Technology, he moved to Wisconsin in 1951. There he established Camcraft, an independent workshop which specialized in repairs and custom modifications to professional photographic equipment. In 1966 he became a technical consultant to Popular Photography, devising a lens testing program for them and creating their testing laboratory, and in 1972 he joined the staff of the magazine. He retired in 1987 after working for Popular Photography for 22 years.

While running Camcraft, he became the first Leica authorized service facility for Leica cameras in the US.  He also published a book about camera technology in 1992, titled “The Dark Side of the Lens.

Goldberg is perhaps best known as the creator of the Camcraft N-5 electric motor drive for the Leica M2 and MP. However, he has also several other inventions for Leicas and other cameras to his credit.  For instance, the clip he designed to permit wearing an M Leica on the belt was widely used, and he also offered modifications of the Visoflex, utilizing either a prism or a pellicle mirror.  He also designed and built a considerable amount of testing equipment to test cameras and lenses, including the equipment used at Popular Photography, and he held numerous patents.

 
 Camcraft N-5 motor with power supply

 
Camcraft N-5 motor attached to Leica M2

The first camcraft N-5 motor was introduced in 1961.  After several modifications to the original design, the final version was made by TPI (Technical Photomation Instruments) of Los Angeles.  Eventually Leitz bought the patents and the rights to the motor.  Over the years they made over a thousand units of what was often called the NY Motor.  It was sold for the M2-M and later for the M4-M.

With the motor in place, 36 exposures could go very fast, and the need to change to a new roll of film was ever present.  This lead to thoughts of a larger capacity of film and Goldberg began to design a 250 exposure conversion of a Leica M2 which incorporated the successful N-5 motor.  The modifications are based on a standard Leicavit rapid advance.  They included larger film compartments at both the supply and take up side of the camera which were attached to the camera and the Leicavit.  The manual film advance of the Leicavit was replaced by the N-5 motor.  Power was supplied via a cord, connected to a separate power supply which contained the batteries.  Only one of the M2-250 cameras is in existence, making it also one of the rarest Leicas.

 

 

 

 

 
 M2-250 original design sketch by Norman Goldberg

Far from walking in the shadow of his father, Don Goldberg is very accomplished in the Leica community himself.  In 1970 he worked at Leitz Wetzlar for two years.  There he received the skills of a Feinmechaniker (Precision Mechanic) a prerequisite for Leica technicians.  With the town of Giessen close by, he also decided to learn about Minox cameras at the Minox plant there.  He worked for Minox for three months and then took a position at the Leica Service department in New Jersey.  In 1980 Don established his own camera service business, DAG which he still runs today.

DAG Camera Service
2128 Vintage Drive
Oregon WI 53575 USA
608-835-3342
Customer Service: dagcam@chorus.net



For other articles on this blog please click on Blog Archive in the column to the right

To comment or to read comments please scroll past the ads below.

All ads present items of interest to Leica owners.

_______________________________________________________________________

Woman wears brown elk-leather camera strap around her shoulders.
      www.eddycam.com        

      


Buy vintage Leica cameras from 
America's premier Leica specialist 

                          
           http://www.tamarkinauctions.com/               http://www.tamarkin.com/leicagallery/upcoming-show



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